Funding for this research was provided by:
Research for Patient Benefit Programme (RB-PG-1013-32049)
Received: 9 June 2020
Accepted: 17 January 2021
First Online: 28 January 2021
Ethics approval and consent to participate
: Ethical approval was given by the London – City Road & Hampstead Research Ethics Committee (Reference: 15/LO/0196).
: Not applicable.
: The authors declare that they have no competing interests.